JP6406429B2 - Rotor for rotating electrical machine and manufacturing method - Google Patents

Description

  The present disclosure relates to a rotor for a rotating electrical machine and a manufacturing method.

  In a rotor of an embedded magnet type motor including a permanent magnet inserted into a magnet insertion hole formed in a rotor core and fixed by an adhesive, the rotor extends in the axial direction of the rotor core on the inner surface of the magnet insertion hole and / or the surface of the permanent magnet. There is known a technique that has a groove that is formed and engageable with a strip member that guides insertion of a permanent magnet when the permanent magnet is inserted into a magnet insertion hole (see, for example, Patent Document 1).

JP 2007-60836 A

  However, in the configuration described in Patent Document 1, it is necessary to insert and cut the strip member for positioning the permanent magnet with respect to the magnet insertion hole, resulting in a complicated manufacturing process.

  Therefore, an object of the present disclosure is to provide a rotor for a rotating electrical machine in which a permanent magnet is positioned with respect to a magnet hole without using a strip member, and a manufacturing method.

According to one aspect of the present disclosure, a rotor core having a magnet hole,
A permanent magnet inserted into the magnet hole,
Provided between the permanent magnet and the wall surface of the magnet hole, including a plurality of capsules inside, an adhesive layer for fixing the permanent magnet to the wall surface of the magnet hole,
A rotor for a rotating electrical machine is provided in which the adhesive layer is provided only on a first wall surface that is one of a radially inner wall surface and an outer wall surface of the magnet hole. The

According to another aspect of the present disclosure, a method for manufacturing a rotor for a rotating electrical machine,
Inserting a permanent magnet into the magnet hole of the rotor core;
Of the inner wall surface and the outer wall surface in the radial direction of the magnet hole, on the first wall surface which is either one of the surfaces, or on the surface facing the first wall surface of the permanent magnet, An application step of applying an adhesive containing a plurality of capsule bodies therein;
And heating the adhesive to form an adhesive layer.

  According to the present disclosure, a rotor for a rotating electrical machine in which a permanent magnet is positioned with respect to a magnet hole without using a strip member and a manufacturing method are obtained.

It is a top view which shows the rotor 10 by one Example (Example 1). 3 is an explanatory diagram of a structure of an adhesive layer 16. FIG. It is a figure which shows notionally the state before and behind the heating expansion of the capsule body 92. FIG. It is explanatory drawing of the formation aspect of the contact bonding layer 16 in the magnet hole part 120. FIG. It is explanatory drawing of the formation aspect of the contact bonding layer 16 in the magnet hole part 120. FIG. It is a figure which shows a rotor provided with the contact bonding layer by a comparative example. It is a top view which concerns on the part containing one magnet hole part 120 of 10 A of rotors. It is sectional drawing of the rotor 10A cut | disconnected by the plane containing the central axis I of the rotor 10A. It is a top view which concerns on the part of the rotor 10B. It is a top view which concerns on the part of 10 C of rotors. It is a top view which concerns on the part of rotor 10D. It is a top view which concerns on the part of the rotor 10E. It is a top view which concerns on the part of the rotor 10F. It is a top view which concerns on the part of the rotor 10G. It is a top view which concerns on the part of the rotor 10H. It is a top view which concerns on the part of the rotor 10I.

  Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a plan view showing a rotor 10 according to one embodiment (first embodiment). In FIG. 1, other components (for example, a shaft, an end plate, etc.) that can be included in the rotor 10 are not shown. In the following, the radial direction and the axial direction are based on the central axis (= rotational axis of the motor) I of the rotor 10 unless otherwise specified. Further, in FIG. 1 and the like, the adhesive layer 16 (the same applies to the adhesive layer 16A and the like) is indicated by hatching with “null” for ease of viewing.

  The rotor 10 is used in an inner rotor type rotating electrical machine. For example, the rotor 10 may be used in a traveling motor used in a hybrid vehicle or an electric vehicle. As shown in FIG. 1, the rotor 10 has an annular shape in plan view. The rotor 10 has a predetermined thickness in the axial direction. That is, the rotor 10 has a form in which the annular form shown in FIG. 1 is continuous in the axial direction.

  The rotor 10 includes a rotor core 12, a permanent magnet 14, and an adhesive layer 16.

  The rotor core 12 is formed of, for example, a laminated silicon steel plate. The rotor core 12 has a magnet hole (slot hole) 120. As shown in FIG. 1, a plurality of magnet hole portions 120 are formed in the circumferential direction. Each of the magnet hole portions 120 has the same shape.

  The rotor core 12 is for an IPM (Internal Permanent Magnet) motor, and the magnet hole 120 does not open in the radial direction of the rotor core 12. That is, the magnet hole 120 is opened only in the axial direction at both axial end surfaces of the rotor core 12. However, the magnet hole 120 may be opened only partially in the radial direction of the rotor core 12 as long as it has a surface on the radially outer side where the permanent magnet 14 abuts in the radial direction. The shape (opening shape) of the magnet hole 120 in plan view is arbitrary, and some examples will be described later. In the example shown in FIG. 1, the magnet hole portion 120 includes a radially inner wall surface 121 and an outer wall surface 122, the outer wall surface 122 at both ends in the circumferential direction, and the wall surfaces 123 and 124 on both sides in the circumferential direction. Tapered surfaces 125 and 126 leading to The tapered surfaces 125 and 126 extend in an oblique direction with respect to the respective wall surfaces 122 (circumferential center portions), 123 and 124. Here, the “tapered surface” means a surface in surface contact with a corresponding surface of the permanent magnet 14. Therefore, the “tapered surface” is a surface having a rounded shape and does not include a surface that does not come into surface contact with the permanent magnet 14.

  The permanent magnet 14 is formed by a neodymium magnet, for example. The permanent magnet 14 is inserted into the magnet hole 120. The permanent magnet 14 is inserted into each of the plurality of magnet hole portions 120. Each of the permanent magnets 14 has the same shape. The shape (sectional shape) of the permanent magnet 14 in plan view is arbitrary, and some examples will be described later. In the example shown in FIG. 1, each permanent magnet 14 includes an outer surface 142 of the radially inner surface 141 and the outer surface 142, and surfaces 143 and 144 on both sides in the circumferential direction. 143 and 144 are connected via tapered surfaces 145 and 146 extending in an oblique direction. The tapered surfaces 145 and 146 of each permanent magnet 14 are formed along the tapered surfaces 125 and 126 (surface contact) of the corresponding magnet hole 120, respectively. Further, the surface 142 of each permanent magnet 14 is formed to be separated from the wall surface 122 of the corresponding magnet hole 120 by a slight distance.

  The adhesive layer 16 is provided between the permanent magnet 14 and the wall surface 121 of the magnet hole 120 so as to adhere to both the permanent magnet 14 and the wall surface 121 of the magnet hole 120. The adhesive layer 16 is provided for each pair of the corresponding permanent magnet 14 and magnet hole 120. The adhesive layer 16 according to each set has substantially the same configuration. Each adhesive layer 16 fixes the corresponding permanent magnet 14 to the wall surface 121 of the opposing magnet hole 120. Each adhesive layer 16 is provided over the entire axial direction of the corresponding permanent magnet 14 and magnet hole 120. Hereinafter, focusing on one arbitrary magnet hole 120, the one magnet hole 120, and the permanent magnets 14 and the adhesive layer 16 provided for the one magnet hole 120 will be described.

  FIG. 2 is an explanatory view of the structure of the adhesive layer 16, and is a perspective view conceptually showing a single state (sheet-like state) of the adhesive 90 before heating. FIG. 3 is a diagram conceptually showing the state of the capsule body 92 before and after the thermal expansion.

  The adhesive layer 16 is formed by heating an adhesive containing a large number of capsules that are heated and expanded. In the example shown in FIG. 2, the adhesive 90 is an epoxy resin 91 in which a large number of capsule bodies 92 that are heated and expanded are blended. The capsule body 92 expands during heating, as shown on the right side of FIG. 3, from the state before heating shown on the left side of FIG. As a result, the adhesive 90 expands as a whole during heating, and the adhesive layer 16 is formed after heating (after curing). Note that the capsule body 92 before heating remains in the adhesive layer 16 as an expanded capsule body even after heating.

  4A and 4B are explanatory views of the formation mode of the adhesive layer 16 in the magnet hole 120. FIG. 4A shows the permanent magnet 14 to which the adhesive 90 before heating is applied or pasted in the magnet hole 120. FIG. The inserted state is shown, and FIG. 4B shows a state in which the heated adhesive layer 16 is formed.

  As shown in FIG. 4A, the permanent magnet 14 to which the adhesive 90 is applied or pasted (hereinafter represented by “application”) is inserted in the magnet hole 120 in the axial direction. The adhesive 90 is applied only to the radially inner surface 141 of the permanent magnet 14 (the surface 141 facing the wall surface 121 of the magnet hole 120). When the heat treatment is performed in the state shown in FIG. 4A, the adhesive layer 16 is formed by the expanded adhesive 90 as shown in FIG. 4B. Here, the adhesive 90 is applied to the permanent magnet 14 side, but the adhesive 90 may be applied to the magnet hole 120 side.

  Here, during the heat treatment, due to the expansion of the adhesive 90, the inner side of the adhesive layer 16 comes into contact with the wall surface 121 on the inner side in the radial direction of the magnet hole 120. As the adhesive 90 further expands, a force is mainly applied to the permanent magnet 14 in the magnet hole 120 outward in the radial direction. Thereby, in the process of expansion of the adhesive 90, the permanent magnet 14 in the magnet hole 120 is moved toward the wall surface 122 on the radially outer side of the magnet hole 120. When the permanent magnet 14 is moved toward the wall surface 122, the tapered surfaces 145 and 146 of the permanent magnet 14 come into contact with the tapered surfaces 125 and 126 of the magnet hole 120. Thereby, the permanent magnet 14 is positioned in the radial direction in a mode (mode positioned in the circumferential direction) guided along the tapered surfaces 125 and 126 of the magnet hole 120. As a result, the permanent magnet 14 is positioned with respect to the magnet hole 120 in the circumferential direction and the radial direction. That is, the permanent magnet 14 is fixed to the rotor core 12 with the tapered surfaces 145 and 146 along the tapered surfaces 125 and 126 of the magnet hole 120 (in surface contact). At this time, a slight gap may be formed between the surface 142 and the central portion in the circumferential direction of the wall surface 122 of the magnet hole 120. Thereby, the positioning function by the taper surfaces 125 and 126 of the wall surface 122 can be enhanced.

  FIG. 5 is a view showing a rotor including an adhesive layer 16 ′ according to a comparative example. In the comparative example, the adhesive layer 16 ′ is formed using an adhesive that does not contain the capsule body 92. According to this comparative example, as shown in FIG. 5, a gap is formed between the wall surface on the radially outer side of the magnet hole 120 and the permanent magnet due to the dripping of the adhesive during the curing process, and the permanent magnet The magnet may not be positioned with respect to the magnet hole.

  In this respect, according to the present embodiment, since the thermally expanding adhesive 90 is used, even if the thickness of the applied adhesive 90 varies, as shown in FIG. The individual difference regarding the radial gap between the circumferential central portion of the wall surface 122 and the permanent magnet 14 can be reduced. Further, as described above, the permanent magnet 14 can be positioned and fixed with respect to the magnet hole 120 using the thermal expansion of the adhesive 90. As a result, it is possible to reduce motor torque fluctuations and variations due to variations in the positions of the permanent magnets 14 in the magnet hole portions 120.

  Next, a rotor 10A according to another embodiment (embodiment 2) will be described with reference to FIGS.

  The rotor 10A according to the second embodiment is different from the rotor 10 according to the first embodiment described above in that the adhesive layer 16 is replaced with the adhesive layer 16A, and the oil paths 74 and 73 are connected to the shaft 18 and the end plates 191 and 192. And 72 are mainly different. Hereinafter, the same components as those of the rotor 10 according to the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 6 is a plan view of a portion including one magnet hole 120 of the rotor 10A. FIG. 7 is a cross-sectional view of the rotor 10A cut by a plane including the central axis I of the rotor 10A, and is a cross-sectional view showing only one half of the central axis I.

  The adhesive layer 16A is the same as the adhesive layer 16 according to the first embodiment described above except that the formation location is different. That is, the adhesive layer 16A is formed by heating an adhesive containing capsules that are heated and expanded.

  The adhesive layer 16 </ b> A forms an oil passage 70 between both ends in the circumferential direction of the permanent magnet 14 and closed on both sides in the circumferential direction. Specifically, the adhesive layer 16 </ b> A includes a first adhesive layer 161 and a second adhesive layer 162. The first adhesive layer 161 is provided at one end in the circumferential direction on the radially inner surface 141 of the permanent magnet 14, and the second adhesive layer 162 is provided at the other end in the circumferential direction on the same surface 141. The first adhesive layer 161 and the second adhesive layer 162 are provided over the entire axial direction of the permanent magnet 14. The first adhesive layer 161 and the second adhesive layer 162 are separated from each other in the circumferential direction. An oil passage 70 is formed between the first adhesive layer 161 and the second adhesive layer 162 in the circumferential direction. As shown in FIG. 7, the oil passage 70 opens at both ends in the axial direction of the rotor core 12 and communicates with the oil passages 73 and 72 of the end plates 191 and 192.

  The end plate 191 is provided around the shaft 18 so as to cover the end surface on the one end side of the rotor 10A in the axial direction. The end plate 192 is provided around the shaft 18 so as to cover the end surface on the other end side of the rotor 10A in the axial direction. The end plate 191 is formed with an oil passage 73 penetrating in the axial direction at each position corresponding to the oil passage 70. The end plate 192 is formed with oil passages 72 that do not penetrate in the axial direction at positions corresponding to the oil passages 70. As shown in FIG. 7, the oil passage 72 extends in the radial direction and communicates with an oil passage 74 formed in the shaft 18. The oil passage 72 may be formed in a form extending radially from the central axis I side when viewed in the axial direction.

  The shaft 18 has an oil passage 75 formed by a hollow portion. The oil passage 75 extends in the axial direction. The oil passage 74 extends in the radial direction and communicates with the oil passage 54.

  When the rotor 10A is rotated during the operation of the rotor 10A, the oil in the oil passage 75 flows radially outward through the oil passage 74 and the oil passage 72 by the action of centrifugal force or discharge pressure. Thereafter, the oil flows in the axial direction through the oil passage 70 and further flows to the downstream side through the oil passage 73. As the oil passes through the oil passage 70, the permanent magnet 14 is cooled. In this manner, the permanent magnet 14 can be cooled by forming the oil passage 70 with the adhesive layer 16A.

  As described above, according to the second embodiment, the permanent magnet 14 can be cooled by forming the oil passage 70 with the adhesive layer 16 </ b> A in addition to the effects of the first embodiment. Since both sides in the circumferential direction of the oil passage 70 are closed by the first adhesive layer 161 and the second adhesive layer 162 and the outer side in the radial direction is closed by the permanent magnet 14, leakage of flowing oil can be reduced.

  By the way, when the oil passage is formed by the rotor core 12 formed of laminated steel plates, there is a possibility that the oil leaks radially outward through the laminated plates of the rotor core 12. For example, when the adhesive layer 16 </ b> A is provided on the outer side in the radial direction rather than the inner side in the radial direction with respect to the permanent magnet 14, there is a possibility that oil leaks out in the radial direction through the laminated plates of the rotor core 12. On the other hand, according to the second embodiment, since the oil passage 70 is closed on the radially outer side by the permanent magnet 14, oil can be effectively prevented from leaking to the radially outer side due to centrifugal force.

  Next, with reference to FIGS. 8 to 11, rotors 10 </ b> B to 10 </ b> E (other configuration examples of the magnet hole and the adhesive layer) according to other embodiments will be described.

  8 to 11 are plan views of portions including one magnet hole 120B and 120C of the rotors 10B to 10E, respectively.

  In the example shown in FIG. 8, the rotor 10B includes a rotor core 12B, permanent magnets 14A and 14B, and an adhesive layer 16B.

  The rotor core 12B is different from the rotor core 12 according to the first embodiment described above in that the magnet hole 120 is replaced with the magnet hole 120B. The magnet hole 120B includes a first magnet hole 121B and a second magnet hole 122B arranged in a V shape. Permanent magnets 14A and 14B are inserted into the first magnet hole 121B and the second magnet hole 122B, respectively.

  Each of the permanent magnets 14A and 14B is different in shape from the permanent magnet 14 according to the first embodiment described above, and does not include the tapered surfaces 145 and 146. The permanent magnets 14A and 14B have shapes substantially corresponding to the first magnet hole 121B and the second magnet hole 122B, respectively.

  The adhesive layer 16B is formed by heating an adhesive containing a capsule that is heated and expanded, like the adhesive layer 16 according to Example 1 described above. As shown in FIG. 8, the adhesive layer 16B includes an adhesive layer 161B provided for the first magnet hole 121B and an adhesive layer 162B provided for the second magnet hole 122B.

  The adhesive layer 161B fixes the permanent magnet 14A to the first magnet hole 121B. As shown in FIG. 8, the adhesive layer 161B includes a radially inner wall surface 131A and a circumferential direction of the first magnet hole 121B among the radially inner wall surface 131A and the outer wall surface 132A of the first magnet hole 121B. It is provided only on the wall surface 134A on one side (in the present example, the side close to the second magnet hole 122B) of the wall surfaces 133A and 134A on both sides. Accordingly, as shown in FIG. 8, the permanent magnet 14A comes into contact with the radially outer wall surface 132A of the first magnet hole 121B and the other side in the circumferential direction due to the thermal expansion of the adhesive during the formation of the adhesive layer 161B. It is positioned and fixed with respect to the first magnet hole 121B in a mode of contacting with the wall surface 133A (that is, a mode of positioning in the radial direction and the circumferential direction).

  The adhesive layer 162B fixes the permanent magnet 14B to the second magnet hole 122B. As shown in FIG. 8, the adhesive layer 162B includes a radially inner wall surface 131B and a circumferential direction of the second magnet hole 122B among the radially inner wall surface 131B and the outer wall surface 132B of the second magnet hole 122B. It is provided only for the wall surface 134B on one side of the wall surfaces 133B and 134B on both sides (the side close to the first magnet hole 121B in this example). As a result, due to the thermal expansion of the adhesive during the formation of the adhesive layer 162B, the permanent magnet 14B comes into contact with the radially outer wall surface 132B of the second magnet hole 122B and the other side in the circumferential direction as shown in FIG. It is positioned and fixed with respect to the second magnet hole 122B in a mode of contacting with the wall surface 133B (that is, a mode of positioning in the radial direction and the circumferential direction).

  In the example shown in FIG. 9, the rotor 10C includes a rotor core 12C, a permanent magnet 14C, and an adhesive layer 16C.

  The rotor core 12C is different from the rotor core 12 according to the first embodiment described above in that the magnet hole 120 is replaced with the magnet hole 120C. Unlike the magnet hole 120 according to the first embodiment described above, the magnet hole 120C does not include the tapered surfaces 125 and 126. That is, in the magnet hole portion 120C, the radially outer wall surface 132C of the radially inner wall surface 131C and the outer wall surface 132C is connected to the circumferential wall surfaces 133C and 134C without a taper surface. The

  The permanent magnet 14C has a different shape from the permanent magnet 14 according to the first embodiment described above, and does not include the tapered surfaces 145 and 146. The permanent magnet 14C has a shape substantially corresponding to the magnet hole 120C.

  The adhesive layer 16C is formed by heating an adhesive in which capsules that are heated and expanded are blended, like the adhesive layer 16 according to the first embodiment described above. As shown in FIG. 9, the adhesive layer 16 </ b> C is provided only on the radially inner wall surface 131 </ b> C and the circumferential wall surfaces 133 </ b> C and 134 </ b> C among the four wall surfaces of the magnet hole 120 </ b> C. That is, as shown in FIG. 9, the adhesive layer 16C is not provided on the radially outer wall surface 132C of the four wall surfaces of the magnet hole 120C. Thus, as shown in FIG. 9, due to the thermal expansion of the adhesive during the formation of the adhesive layer 16C, the permanent magnet 14C comes into contact with the wall surface 132C on the radially outer side of the magnet hole 120C (that is, positioned in the radial direction). In this manner, it is positioned and fixed with respect to the magnet hole 120C.

  In the example shown in FIG. 10, the rotor 10D includes a rotor core 12C, a permanent magnet 14C, and an adhesive layer 16D. The rotor 10D is different from the rotor 10C shown in FIG. 9 in that the adhesive layer 16C is replaced with the adhesive layer 16D.

  The adhesive layer 16D is formed by heating an adhesive containing capsules that are heated and expanded, like the adhesive layer 16 according to Example 1 described above. As shown in FIG. 10, the adhesive layer 16D is provided only on the radially outer wall surface 132C and the circumferential wall surfaces 133C and 134C among the four wall surfaces of the magnet hole 120C. That is, as shown in FIG. 10, the adhesive layer 16D is not provided on the radially inner wall surface 131C among the four wall surfaces of the magnet hole 120C. Thereby, as shown in FIG. 10, due to the thermal expansion of the adhesive during the formation of the adhesive layer 16D, the permanent magnet 14C comes into contact with the wall surface 131C on the radially inner side of the magnet hole 120C (that is, positioned in the radial direction). In this manner, it is positioned and fixed with respect to the magnet hole 120C.

  In the example shown in FIG. 11, the rotor 10E includes a rotor core 12C, a permanent magnet 14C, and an adhesive layer 16E. The rotor 10E is different from the rotor 10C shown in FIG. 9 in that the adhesive layer 16C is replaced with the adhesive layer 16E.

  The adhesive layer 16E is formed by heating an adhesive containing capsules that are heated and expanded, like the adhesive layer 16 according to Example 1 described above. As shown in FIG. 11, the adhesive layer 16 </ b> E includes a radially inner wall surface 131 </ b> C among the four wall surfaces of the magnet hole 120 </ b> C and one wall surface 133 </ b> C of the circumferential wall surfaces 133 </ b> C and 134 </ b> C. Only provided. That is, the adhesive layer 16E is not provided on the wall surface 132C and the wall surface 134C among the four wall surfaces of the magnet hole 120C as shown in FIG. Thus, as shown in FIG. 11, due to the thermal expansion of the adhesive during the formation of the adhesive layer 16E, the permanent magnet 14C is in contact with the wall surface 132C on the radially outer side of the magnet hole 120C and in contact with the wall surface 134C. (In other words, it is positioned and fixed with respect to the magnet hole 120C in a manner of being positioned in the radial direction and the circumferential direction).

  Next, rotors 10F to 10I according to other embodiments will be described with reference to FIGS.

  12 to 15 are plan views of portions including one magnet hole 120F to 120I of the rotors 10F to 10I, respectively.

  The rotor 10F shown in FIG. 12 differs from the rotor 10 according to the first embodiment described above in that the rotor core 12 is replaced with the rotor core 12F, and the adhesive layer 16 is replaced with the adhesive layer 16F. Hereinafter, the same components as those of the rotor 10 according to the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  The rotor core 12F is different from the rotor core 12 according to the first embodiment described above in that a protrusion 128F is formed in the magnet hole 120F. The protrusion 128F is provided on the wall surface 121F on the radially inner side of the magnet hole 120F. The protruding portion 128 </ b> F protrudes in the radial direction toward the central portion in the circumferential direction of the permanent magnet 14. That is, the projecting portion 128 </ b> F does not face the both ends in the circumferential direction of the permanent magnet 14 in the radial direction. The protrusion 128F is provided over the entire axial direction of the rotor core 12F. The radial gap between the protruding portion 128F and the central portion in the circumferential direction of the permanent magnet 14 may be a minimum gap required when the permanent magnet 14 is assembled to the magnet hole 120F.

  The adhesive layer 16F is the same as the adhesive layer 16 according to the first embodiment except that the formation location is different. That is, the adhesive layer 16F is formed by heating an adhesive containing a capsule that is heated and expanded.

  The adhesive layers 16F are provided at both ends in the circumferential direction of the permanent magnet 14 so as to be separated in the circumferential direction. Specifically, the adhesive layer 16F includes a first adhesive layer 161F and a second adhesive layer 162F. The first adhesive layer 161F is provided at one end in the circumferential direction of the radially inner wall surface 121F of the magnet hole 120F, and the second adhesive layer 162F is provided at the other circumferential end of the wall surface 121F. The first adhesive layer 161F and the second adhesive layer 162F are provided over the entire axial direction of the permanent magnet 14. The first adhesive layer 161F and the second adhesive layer 162F are separated from each other in the circumferential direction. The protrusion 128F is located between the first adhesive layer 161F and the second adhesive layer 162F in the circumferential direction. In other words, the first adhesive layer 161F and the second adhesive layer 162F are provided on the outer side in the circumferential direction with respect to the protruding portion 128F.

  According to the example shown in FIG. 12, the same effects as those of the first embodiment described above can be obtained. That is, the permanent magnet 14 comes into contact with the tapered surfaces 125 and 126 (see FIGS. 4A and 4B) of the wall surface 122 on the radially outer side of the magnet hole 120 due to the thermal expansion of the adhesive when the adhesive layer 16 </ b> F is formed. (In other words, it is positioned and fixed with respect to the magnet hole 120 in a manner of being positioned in the radial direction).

  By the way, generally, the magnetic saturation at each position in the circumferential direction of the rotor core 12F is such that the positions corresponding to both ends of the circumferential magnet hole 120F correspond to the central part of the circumferential magnet hole 120F. More likely to occur. That is, magnetic saturation is likely to occur in a region near the end of the circumferential magnet hole 120F in the rotor core 12F.

  In this regard, according to the example shown in FIG. 12, the rotor core 12F includes the protruding portion 128F at a position corresponding to the central portion of the circumferential magnet hole 120F. Thereby, compared with the case where the protrusion part 128F is not provided, magnetic resistance can be reduced, As a result, the torque characteristic of a rotary electric machine can be improved. Moreover, according to the example shown in FIG. 12, compared with the case where the same protrusion is provided in the position corresponding to the both ends of the magnet hole part of the circumferential direction, magnetic resistance can be reduced efficiently. This is because, as described above, magnetic saturation is likely to occur at positions corresponding to both ends of the magnet hole 120F in the circumferential direction. In this way, according to the example shown in FIG. 12, by providing the adhesive layer 16F in the region where magnetic saturation is likely to occur in the circumferential direction, the protrusion 128F is provided in the region where magnetic saturation is difficult to occur in the circumferential direction. The magnetic resistance can be efficiently reduced while enjoying the above-described effect of the adhesive layer 16F.

  The rotor 10G shown in FIG. 13 differs from the rotor 10B shown in FIG. 8 described above in that the rotor core 12B is replaced with the rotor core 12G and the adhesive layer 16B is replaced with the adhesive layer 16G. Hereinafter, the same components as those of the rotor 10B shown in FIG.

  The rotor core 12G is different from the rotor core 12B according to the example shown in FIG. 8 described above in that a protrusion 128G is formed in the magnet hole 120G. The protrusion 128G is provided in each of the first magnet hole 121G and the second magnet hole 122G of the magnet hole 120G. The protrusion 128G is provided on the radially inner wall surfaces 1311A and 1311B of the first magnet hole 121G and the second magnet hole 122G, respectively, similarly to the rotor 10F shown in FIG. The protruding portion 128G of the first magnet hole 121G protrudes in the radial direction toward the central portion in the circumferential direction of the permanent magnet 14A. That is, the projecting portion 128G of the first magnet hole 121G does not face the circumferential end portions of the permanent magnet 14A in the radial direction. The protruding portion 128G of the second magnet hole 122G protrudes in the radial direction toward the central portion in the circumferential direction of the permanent magnet 14B. In other words, the protruding portion 128G of the second magnet hole 122G does not face the circumferential end portions of the permanent magnet 14B in the radial direction. Each protrusion 128G is provided over the entire axial direction of the rotor core 12G. The radial gap between each projecting portion 128G and the central portion in the circumferential direction of the permanent magnet 14 is the minimum gap necessary for assembling the permanent magnets 14A and 14B into the magnet hole 120G. Good.

  The adhesive layer 16G is the same as the adhesive layer 16B according to the example shown in FIG. That is, the adhesive layer 16G is formed by heating an adhesive containing a capsule that is heated and expanded.

  As shown in FIG. 13, the adhesive layer 16G includes an adhesive layer 161G and an adhesive layer 1611G provided for the first magnet hole 121G, and an adhesive layer 162G and an adhesive layer 1612G provided for the second magnet hole 122G. Including.

  The adhesive layer 161G and the adhesive layer 1611G fix the permanent magnet 14A to the first magnet hole 121G. As shown in FIG. 13, the adhesive layer 161G and the adhesive layer 1611G include a radially inner wall surface 1311A and a first magnet hole of the radially inner wall surface 1311A and the outer wall surface 132A of the first magnet hole 121G. It is provided only on the wall surface 134A on one side (the side close to the second magnet hole 122G in this example) of the wall surfaces 133A and 134A on both sides in the circumferential direction of 121G. Thereby, due to the thermal expansion of the adhesive during the formation of the adhesive layer 161G and the adhesive layer 1611G, as shown in FIG. 13, the permanent magnet 14A comes into contact with the circumferentially outer wall surface 132A of the first magnet hole 121G and It is positioned and fixed with respect to the first magnet hole 121G in a mode of contacting with the wall surface 133A on the other side of the direction (that is, a mode of positioning in the radial direction and the circumferential direction).

  The adhesive layer 161G and the adhesive layer 1611G are provided at both ends in the circumferential direction of the permanent magnet 14A so as to be separated in the circumferential direction. Specifically, the adhesive layer 161G is provided at one end in the circumferential direction of the radially inner wall surface 1311A, and the adhesive layer 1611G is provided at the other circumferential end of the radially inner wall surface 1311A. The adhesive layer 161G and the adhesive layer 1611G are provided over the entire axial direction of the permanent magnet 14A. The adhesive layer 161G and the adhesive layer 1611G are separated from each other in the circumferential direction. A protrusion 128G is located between the adhesive layer 161G and the adhesive layer 1611G in the circumferential direction. In other words, the adhesive layer 161G and the adhesive layer 1611G are provided on the outer side in the circumferential direction than the protruding portion 128G.

  The adhesive layer 162G and the adhesive layer 1612G fix the permanent magnet 14B to the second magnet hole 122G. As shown in FIG. 13, the adhesive layer 162G and the adhesive layer 1612G include a radially inner wall surface 1311B and a second magnet hole of the radially inner wall surface 1311B and the outer wall surface 132B of the second magnet hole 122G. It is provided only on the wall surface 134B on one side (side closer to the first magnet hole 121G in this example) of the wall surfaces 133B and 134B on both sides in the circumferential direction of 122G. Thereby, as shown in FIG. 13, due to the thermal expansion of the adhesive during the formation of the adhesive layer 162G and the adhesive layer 1612G, the permanent magnet 14B comes into contact with the circumferentially outer wall surface 132B of the second magnet hole 122G and It is positioned and fixed with respect to the second magnet hole 122G in a mode of contacting with the wall surface 133B on the other side in the direction (that is, a mode of positioning in the radial direction and the circumferential direction).

  The adhesive layer 162G and the adhesive layer 1612G are provided at both ends in the circumferential direction of the permanent magnet 14B so as to be separated in the circumferential direction. Specifically, the adhesive layer 162G is provided at one end in the circumferential direction of the radially inner wall surface 1311B, and the adhesive layer 1612G is provided at the other circumferential end of the radially inner wall surface 1311B. The adhesive layer 162G and the adhesive layer 1612G are provided over the entire axial direction of the permanent magnet 14B. The adhesive layer 162G and the adhesive layer 1612G are separated from each other in the circumferential direction. A protrusion 128G is located between the adhesive layer 162G and the adhesive layer 1612G in the circumferential direction. In other words, the adhesive layer 162G and the adhesive layer 1612G are provided on the outer side in the circumferential direction than the protruding portion 128G.

  According to the example shown in FIG. 13, in addition to the same effect as the example shown in FIG. 8 described above, the same effect as the example shown in FIG. 12 described above can be obtained.

  The rotor 10H shown in FIG. 14 differs from the rotor 10C shown in FIG. 9 described above in that the rotor core 12C is replaced with the rotor core 12H, and the adhesive layer 16C is replaced with the adhesive layer 16H. Hereinafter, the same components as those of the rotor 10C shown in FIG. 9 described above are denoted by the same reference numerals, and description thereof is omitted.

  The rotor core 12H is different from the rotor core 12C according to the example shown in FIG. 9 described above in that a protrusion 128H is formed in the magnet hole 120H. The protrusion 128H is provided on the wall surface 131H on the radially inner side of the magnet hole 120H. The protruding portion 128H protrudes in the radial direction toward the central portion in the circumferential direction of the permanent magnet 14C. That is, the projecting portion 128H does not oppose the both end portions in the circumferential direction of the permanent magnet 14C in the radial direction. The protrusion 128H is provided over the entire axial direction of the rotor core 12H. The radial gap between the projecting portion 128H and the central portion in the circumferential direction of the permanent magnet 14C may be a minimum gap necessary for assembling the permanent magnet 14C into the magnet hole 120H.

  The adhesive layer 16H is the same as the adhesive layer 16C according to the example shown in FIG. That is, the adhesive layer 16H is formed by heating an adhesive containing a capsule that is heated and expanded.

  The adhesive layer 16H is provided at both ends in the circumferential direction of the permanent magnet 14C so as to be separated in the circumferential direction. Specifically, the adhesive layer 16H includes a first adhesive layer 161H and a second adhesive layer 162H. The first adhesive layer 161H is provided on one end in the circumferential direction and the wall surface 133C of the radially inner wall surface 131H of the magnet hole 120H, and the second adhesive layer 162H is the other end in the circumferential direction and the wall surface 134C on the wall surface 131H. Is provided. The first adhesive layer 161H and the second adhesive layer 162H are provided over the entire axial direction of the permanent magnet 14C. The first adhesive layer 161H and the second adhesive layer 162H are separated from each other in the circumferential direction. A protrusion 128H is located between the first adhesive layer 161H and the second adhesive layer 162H in the circumferential direction. In other words, the first adhesive layer 161H and the second adhesive layer 162H are provided on the outer side in the circumferential direction with respect to the protruding portion 128H.

  According to the example shown in FIG. 14, in addition to the same effect as the example shown in FIG. 9 described above, the same effect as the example shown in FIG. 12 described above can be obtained.

  The rotor 10I shown in FIG. 15 differs from the rotor 10D shown in FIG. 10 described above in that the rotor core 12C is replaced with the rotor core 12I and the adhesive layer 16D is replaced with the adhesive layer 16I. Hereinafter, the same components as those of the rotor 10D illustrated in FIG. 10 described above are denoted by the same reference numerals, and description thereof is omitted.

  The rotor core 12I is different from the rotor core 12D according to the example shown in FIG. 10 described above in that a protrusion 128I is formed in the magnet hole 120I. The protrusion 128I is provided on the wall surface 132I on the radially outer side of the magnet hole 120I. The protruding portion 128I protrudes in the radial direction toward the central portion in the circumferential direction of the permanent magnet 14C. That is, the projecting portion 128I does not oppose the circumferential end portions of the permanent magnet 14C in the radial direction. The protrusion 128I is provided over the entire axial direction of the rotor core 12I. The radial gap between the projecting portion 128I and the central portion in the circumferential direction of the permanent magnet 14C may be a minimum gap necessary for assembling the permanent magnet 14C into the magnet hole 120F.

  The adhesive layer 16I is the same as the adhesive layer 16C according to the example shown in FIG. That is, the adhesive layer 16I is formed by heating an adhesive containing capsules that are heated and expanded.

  The adhesive layer 16I is provided on both ends of the permanent magnet 14C in the circumferential direction so as to be separated in the circumferential direction. Specifically, the adhesive layer 16I includes a first adhesive layer 161I and a second adhesive layer 162I. The first adhesive layer 161I is provided on the circumferential end of the radially outer wall surface 132I and the wall surface 133C of the magnet hole 120I, and the second adhesive layer 162I is disposed on the circumferential end of the wall surface 132I and the wall surface 134C. Is provided. The first adhesive layer 161I and the second adhesive layer 162I are provided over the entire axial direction of the permanent magnet 14C. The first adhesive layer 161I and the second adhesive layer 162I are separated from each other in the circumferential direction. The protrusion 128I is located between the first adhesive layer 161I and the second adhesive layer 162I in the circumferential direction. In other words, the first adhesive layer 161I and the second adhesive layer 162I are provided on the outer side in the circumferential direction with respect to the protruding portion 128I.

  According to the example shown in FIG. 15, in addition to the same effect as the example shown in FIG. 10 described above, the same effect as the example shown in FIG. 12 described above can be obtained.

  Although each embodiment has been described in detail above, it is not limited to a specific embodiment, and various modifications and changes can be made within the scope described in the claims. It is also possible to combine all or a plurality of the components of the above-described embodiments.

  For example, in the first embodiment described above, the tapered surface 125 is formed continuously with respect to the central portion in the circumferential direction of the wall surface 122, but between the central portion in the circumferential direction of the wall surface 122 and the tapered surface 125. Other surfaces may be interposed. The same applies to the tapered surface 126.

  Moreover, although each Example mentioned above is an application example with respect to an inner rotor type, it is also possible to apply to an outer rotor type. This is because, in the case of the outer rotor type, the inside and outside in the radial direction are basically reversed.

  Further, in each of the embodiments shown in FIGS. 8 to 11, the cooling structure according to the second embodiment may be applied. That is, the oil passage 70 may be formed in each adhesive layer (adhesive layer 16B etc.).

In addition, the following is further disclosed regarding the above Example.
(1)
A rotor core (12, 12B-I) having magnet holes (120, 120B-I);
Permanent magnets (14, 14A, 14B, 14C) inserted into the magnet holes (120, 120B to I);
Provided between the permanent magnets (14, 14A, 14B, 14C) and the wall surfaces of the magnet hole portions (120, 120B to I), including a plurality of capsule bodies (92) inside, the permanent magnets (14, 14A, 14B, 14C) and an adhesive layer (16, 16A to 16I) that fixes the wall surface of the magnet hole (120, 120B-I),
The adhesive layers (16, 16A to 16I) are arranged on the inner wall surface (121, 121F, 131A to C, 131H, 131I, 1311A, 1311B) in the radial direction of the magnet hole (120, 120B to I) and the outer wall surface ( 122, 132A to C, 132I), the rotor (10, 10A to 10I) for a rotating electrical machine provided only on the wall surface on the first side, which is one side.
According to the configuration described in (1), the first-side wall surface on which the adhesive layers (16, 16A to 16I) are provided by the adhesive layers (16, 16A to 16I) including a plurality of capsule bodies (92) therein The permanent magnets (14, 14A, 14B, 14C) are brought into surface contact with the wall surface (122) of the magnet hole (120, 120B to I) on the opposite side (second side) with no gap (ie, surface). Can be easily pressed). That is, by using the expansion of the adhesive forming the adhesive layers (16, 16A to 16I) when heated (expansion of the plurality of capsule bodies (92)), the side opposite to the wall surface on the first side (second side) ) Of the permanent magnets (14, 14A, 14B, 14C) can be reliably brought into contact with the wall surfaces of the magnet hole portions (120, 120B to I). Thereby, the rotor (10, 10A to 10I) in which the permanent magnets (14, 14A, 14B, 14C) are positioned at least in the radial direction with respect to the magnet holes (120, 120B to I) without using the strip member. Can be obtained.
(2)
The wall surface on the second side of the magnet hole (120, 120F) includes tapered surfaces (125, 126) connected to the wall surfaces (123, 124) on both sides in the circumferential direction,
The permanent magnet (14) has tapered surfaces (145, 146) in surface contact with the tapered surfaces (125, 126) of the magnet hole (120),
The adhesive layer (16, 16F) is provided only on the first wall surface of the four wall surfaces (121 to 124: 121F, 122 to 144) of the magnet hole (120), (1) (10, 10A, 10F).
According to the configuration described in (2), the magnet hole on the opposite side (second side) from the wall surface on the first side is utilized by utilizing expansion during heating of the adhesive forming the adhesive layer (16, 16F). It becomes easy to bring the permanent magnet (14) into surface contact with the wall surface of the portion (120, 120F) without any gap. When the adhesive forming the adhesive layer (16, 16F) expands when heated, the tapered surface (145, 146) of the permanent magnet (14) is formed on the tapered surface (125, 126) of the magnet hole (120, 120F). Is guided so as to be in surface contact, it is possible to position not only in the radial direction but also in the circumferential direction.
(3)
The magnet hole (120B, 120G) includes a first magnet hole (121B, 121G) and a second magnet hole (122B, 122G) arranged in a V shape,
The adhesive layers (161B, 161G) relating to the first magnet holes (121B, 121G) are the inner wall surfaces (131A) and the outer wall surfaces (132A) in the radial direction of the first magnet holes (121B, 121G). Provided only on the wall surface on one side of the wall surface (133A, 134A) on both sides in the circumferential direction of the first magnet hole (121B, 121G),
The adhesive layer (162B, 162G) related to the second magnet hole (122B, 122G) is composed of the radially inner wall surface (131B) and the outer wall surface (132B) of the second magnet hole (122B, 122G). The rotation according to (1), which is provided only on the wall surface on one side of the wall surface (133B, 134B) on both sides in the circumferential direction of the first magnet hole (122B, 122G). Rotor for electric machine (10B, 10G).
According to the configuration described in (3), each magnet hole on the opposite side (second side) to the wall surface on the first side (second side) is utilized by utilizing expansion during heating of the adhesive forming the adhesive layer (16). 121B, 122B: 121G, 122G), the permanent magnets (14A, 14B) can be easily brought into surface contact with no gap. Further, since the adhesive layers (161B, 161G) are provided only on one of the wall surfaces (133A, 134A) on both sides in the circumferential direction of the first magnet hole (121B, 121G), the first magnet hole The circumferential positioning of the permanent magnet (14A) with respect to (121B, 121G) is also possible. Similarly, the adhesive layer (162B, 162G) is provided only on one of the wall surfaces (133B, 134B) on both sides in the circumferential direction of the second magnet hole (122B, 122G). The circumferential positioning of the permanent magnet (14B) with respect to the two magnet holes (122B, 122G) is also possible.
(4)
The wall surface on the second side of the magnet hole (120C, 120H, 120I) is connected to the wall surfaces (133C, 134C) on both sides in the circumferential direction without a taper surface,
The adhesive layer (16C to 16E, 16H, 16I) includes a wall on the first side among the four wall surfaces (131C to 134C, 131H, 132C to 134C) of the magnet hole (120C, 120H, 120I), The rotor (10C, 10E, 10H, 10I) for a rotating electrical machine according to (1), which is provided only on at least one of the wall surfaces (133C, 134C) on both sides in the circumferential direction.
According to the configuration described in (4), by using expansion during heating of the adhesive forming the adhesive layers (16C to 16E, 16H, 16I), the side opposite to the wall surface on the first side (second side) It is easy to bring the permanent magnet (14C) into surface contact with the wall surface of the magnet hole portion (120C, 120H, 120I) of () without a gap.
(5)
The adhesive layer (16A) is provided only on the radially inner wall surface (121) among the radially inner wall surface (121) and the outer wall surface (122) of the magnet hole (120),
The adhesive layer (16A) provided on the radially inner wall surface (121) is an oil passage (70) in which both sides in the circumferential direction are closed between both circumferential ends of the permanent magnet (14), The rotor (10A) for a rotating electrical machine according to any one of (1) to (4), wherein an oil passage (70) that opens at both axial ends of the rotor core (12) is formed.
According to the configuration described in (5), the expansion at the time of heating of the adhesive forming the adhesive layer (16A) is utilized, and the magnet hole (120) is on the side opposite to the first wall surface. It becomes easy to bring the permanent magnet (14) into surface contact with the wall surface (122) on the radially outer side without a gap. Moreover, the oil path (70) with which both sides of the circumferential direction were obstruct | occluded can be formed between the both ends of the circumferential direction of an adhesive layer (16A), and cooling of a permanent magnet (14) is attained. Moreover, since the outer side in the radial direction of the oil passage (70) is formed by the permanent magnet (14), the oil that can be generated when the outer side in the radial direction of the oil passage (70) is formed by the rotor core of the laminated steel plate also reduces leakage. it can.
(6)
The rotor core (12F to 12I) has a protruding portion (128F to 128I) protruding in the radial direction toward the circumferential central portion of the permanent magnet (14, 14A, 14B, 14C) on the first wall surface. ,
The adhesive layer (16F to 16I) provided on the wall surface on the first side is any one of (1) to (4), which is located on the outer side in the circumferential direction with respect to the protrusions (128F to 128I). Rotors (10F to 10I) for rotating electrical machines.
According to the configuration described in (6), the rotor core (12F to 12I) has the protruding portion (128F to 128I) formed on the wall surface on the first side of the magnet hole (120F to 120I). Therefore, compared with the case where the protrusions (128F to 128I) are not formed, the magnetic resistance can be reduced and the torque characteristics of the rotating electrical machine can be improved. By the way, the end in the circumferential direction of the magnet hole (120F to 120I) is likely to cause magnetic saturation, and even if a similar protrusion is formed at the end in the circumferential direction of the magnet hole (120F to 120I), The magnetic resistance cannot be reduced efficiently. In consideration of this point, according to the configuration described in (6), the adhesive layers (16F to 16I) provided on the wall surface on the first side are outside in the circumferential direction from the protrusions (128F to 128I), that is, It is located at the end in the circumferential direction of the magnet hole (120F to 120I). As described above, the adhesive layers (16F to 16I) are provided in the region where the magnetic saturation is likely to occur, and the protrusions (128F to 128I) are provided in the region where the magnetic saturation is difficult to occur. The magnetic resistance can be efficiently reduced while enjoying the above-described effects.
(7)
The rotor (10F to 10I) for a rotating electrical machine according to (6), wherein there is a gap between the protruding portion (128F to 128I) and the permanent magnet (14, 14A, 14B, 14C) in the radial direction.

According to the configuration described in (7), the protrusions (128F to 128I) are maintained while maintaining the ease of assembly of the permanent magnets (14, 14A, 14B, and 14C) into the magnet hole portions 120 (128F to 128I). Thus, the magnetic resistance can be reduced efficiently.
(8)
A method of manufacturing a rotor (10, 10A to 10I) for a rotating electrical machine,
Inserting the permanent magnets (14, 14A, 14B, 14C) into the magnet holes (120, 120B to I) of the rotor core (12, 12B, 12C);
Of the inner wall surface (121, 121F, 131A to C, 131H, 131I, 1311A, 1311B) and the outer wall surface (122, 132A to C, 132I) in the radial direction of the magnet hole (120, 120B to I) A plurality of capsule bodies (92) are included in the wall on the first side, which is one of the sides, or on the surface facing the wall on the first side of the permanent magnet (14, 14A, 14B, 14C). An application step of applying an adhesive (90);
Heating the adhesive (90) to form the adhesive layers (16, 16A to 16I).

According to the manufacturing method described in (8), for example, the rotor (10, 10A to 10I) described in (1) above can be obtained.
(9)
The wall surface on the second side opposite to the first side in the radial direction in the magnet hole (120, 120F) includes tapered surfaces (125, 126) connected to the wall surfaces (123, 124) on both sides in the circumferential direction, and is permanent. The magnet (14) has a tapered surface (145, 146) in surface contact with the tapered surface (125, 126) of the magnet hole (120, 120F),
The coating process is performed on the first wall surface of the four wall surfaces (121 to 124: 121F, 122 to 144) of the magnet hole or on the first wall surface of the permanent magnet (14). The manufacturing method as described in (8) including apply | coating an adhesive agent (90) to the surface to do.

According to the manufacturing method described in (9), for example, the rotor (10, 10A, 10F) described in (2) above can be obtained.
(10)
The magnet hole (120B, 120G) includes a first magnet hole (121B, 121G) and a second magnet hole (122B, 122G) arranged in a V shape,
The coating step includes the first wall surface and the first magnet hole (121B, 121G) of the first inner wall surface (131A) and the outer wall surface (132A) in the radial direction of the first magnet hole (121B, 121G). The adhesive (90) is applied to one wall surface of the wall surfaces (133A, 134A) on both sides in the circumferential direction or to the surface facing the first wall surface of the permanent magnet (14A, 14B). In addition, the adhesive layer (162B, 162G) related to the second magnet hole (122B, 122G) has a radially inner wall surface (131B) and an outer wall surface (132B) of the second magnet hole (122B, 122G). Wall surface on one side of the wall surface (133B, 134B) on both sides in the circumferential direction of the first magnet hole (122B, 122G), or the permanent magnet (14A, 14B). The other in Comprising on the opposing surface of the wall surface coated with the adhesive (90) The production method according to (8).

According to the manufacturing method described in (10), for example, the rotor (10B, 10G) described in (3) above can be obtained.
(11)
The wall surface on the second side opposite to the first side in the radial direction in the magnet hole (120C, 120H, 120I) is connected to the wall surfaces (133C, 134C) on both sides in the circumferential direction without a taper surface,
Of the four wall surfaces (131C to 134C, 131H, 132C to 134C) of the magnet hole (120C, 120H, 120I), the coating process includes the first wall surface and the circumferential wall surfaces (133C, 134C). ), Or a surface of the permanent magnet (14C) facing the one wall surface of the permanent magnet (14C) by applying an adhesive (90). Method.

According to the manufacturing method described in (11), for example, the rotor (10C, 10E, 10H, 10I) described in (4) above can be obtained.
(12)
The coating step is performed on the radially inner wall surface (121) or the diameter of the permanent magnet (14) among the radially inner wall surface (121) and the outer wall surface (122) of the magnet hole (120). Applying an adhesive (90) to the surface facing the inner wall in the direction,
The adhesive layer (16A) formed on the radially inner wall surface is an oil passage (70) closed on both sides in the circumferential direction between both ends in the circumferential direction of the permanent magnet (14), and the rotor core (12). The manufacturing method according to any one of (8) to (11), wherein an oil passage (70) that opens at both ends in the axial direction is formed.

  According to the manufacturing method described in (12), for example, the rotor (10A) described in (5) above can be obtained.

  This international application claims priority based on Japanese Patent Application No. 2015-055062 filed on March 18, 2015 and Japanese Patent Application No. 2015-173748 filed on September 3, 2015. The entire contents of which are hereby incorporated by reference into the present international application.

10, 10A to 10E Rotor 12, 12B, 12C Rotor core 14, 14A, 14B, 14C Permanent magnet 16, 16A to 16E Adhesive layer 70 Oil passage 92 Capsule body 120, 120B, 120C Magnet hole portion 121B First magnet hole 122B Second Magnet hole 125, 126 Tapered surface 121 to 124, 131A to C, 132A to C, 133A to C, 134A to C Wall surface 145, 146 Tapered surface

Claims (10)

A rotor core having a magnet hole;
A permanent magnet inserted into the magnet hole,
Provided between the permanent magnet and the wall surface of the magnet hole, including a plurality of capsules inside, an adhesive layer for fixing the permanent magnet to the wall surface of the magnet hole,
The adhesive layer is provided only on the first-side wall surface, which is one of the radially inner wall surface and the outer wall surface of the magnet hole ,
The rotor core has a protruding portion that protrudes in a radial direction toward a central portion in a circumferential direction of the permanent magnet on the wall surface on the first side,
The rotor for a rotating electrical machine , wherein the adhesive layer provided on the wall surface on the first side is located on the outer side in the circumferential direction with respect to the protrusion . The wall surface on the second side opposite to the first side in the radial direction in the magnet hole portion includes a tapered surface connected to the wall surfaces on both sides in the circumferential direction,
The permanent magnet has a tapered surface in surface contact with the tapered surface of the magnet hole,
The rotor for a rotating electrical machine according to claim 1, wherein the adhesive layer is provided only on the wall surface on the first side among the four wall surfaces of the magnet hole. The magnet hole includes a first magnet hole and a second magnet hole arranged in a V shape,
The adhesive layer related to the first magnet hole is formed on the first side wall surface and the circumferential side of the first magnet hole among the radially inner wall surface and the outer wall surface of the first magnet hole. Provided only on one of the walls,
The adhesive layer related to the second magnet hole is formed on both the first wall surface and the circumferential side of the second magnet hole among the radially inner wall surface and the outer wall surface of the second magnet hole. The rotor for a rotating electrical machine according to claim 1, wherein the rotor is provided only on one of the wall surfaces. The wall surface on the second side opposite to the first side in the radial direction in the magnet hole portion is connected to the wall surfaces on both sides in the circumferential direction without a taper surface,
The adhesive layer is provided only on at least one of the wall surfaces on the first side and the wall surfaces on both sides in the circumferential direction among the four wall surfaces of the magnet hole portion. A rotor for a rotating electrical machine according to claim 1. The rotor for rotary electric machines as described in any one of Claim 1 to 4 which has a clearance gap between the said protrusion part and the said permanent magnet in radial direction. A method of manufacturing a rotor for a rotating electrical machine,
Inserting a permanent magnet into the magnet hole of the rotor core;
Of the inner wall surface and the outer wall surface in the radial direction of the magnet hole, on the first wall surface which is either one of the surfaces, or on the surface facing the first wall surface of the permanent magnet, An application step of applying an adhesive containing a plurality of capsule bodies therein;
Look including a step of forming an adhesive layer by heating the adhesive,
The rotor core has a protruding portion that protrudes in a radial direction toward a central portion in a circumferential direction of the permanent magnet on the wall surface on the first side,
The said adhesion layer formed in the said 1st side wall surface is a manufacturing method located in the outer side of the circumferential direction rather than the said protrusion part . The wall surface on the second side opposite to the first side in the radial direction in the magnet hole portion includes a tapered surface connected to the wall surfaces on both sides in the circumferential direction, and the permanent magnet faces the tapered surface of the magnet hole portion. Having a tapered surface to contact,
In the coating step, the adhesive is coated on the first side wall surface of the four wall surfaces of the magnet hole or on the surface of the permanent magnet facing the first wall surface. The manufacturing method of Claim 6 including this. The magnet hole includes a first magnet hole and a second magnet hole arranged in a V shape,
The coating step is performed on one side of the wall surface on the first side and the wall surfaces on both sides in the circumferential direction of the first magnet hole among the radially inner wall surface and the outer wall surface of the first magnet hole. Applying the adhesive to a wall surface or a surface of the permanent magnet facing the wall surface on the first side, and out of a radially inner wall surface and an outer wall surface of the second magnet hole The wall surface on the first side, the surface facing the wall surface on the first side in the permanent magnet, and the wall surface on either side of the wall surfaces on both sides in the circumferential direction of the second magnet hole, or The manufacturing method of Claim 6 including apply | coating the said adhesive agent to the surface which opposes this one wall surface in a permanent magnet. The wall surface on the second side opposite to the first side in the radial direction in the magnet hole portion is connected to the wall surfaces on both sides in the circumferential direction without a taper surface,
Of the four wall surfaces of the magnet hole portion, the coating step includes the first side wall surface, the surface facing the first side wall surface of the permanent magnet, and the wall surfaces on both sides in the circumferential direction. The manufacturing method of Claim 6 including apply | coating the said adhesive agent to the wall surface on the at least any one side of these, or the surface facing this one wall surface in the said permanent magnet. The manufacturing method as described in any one of Claim 6 to 9 which has a clearance gap between the said protrusion part and the said permanent magnet in radial direction.

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